Exhaust valve and battery cover plate assembly

Abstract

The utility model discloses an exhaust valve and a battery cover plate assembly, the exhaust valve comprises an inner valve body, an outer valve body and a sealing piece, the two ends of the inner valve body along the axial direction are respectively provided with a first exhaust port and a second exhaust port, and the first exhaust port is used for being communicated with an exhaust hole of gas production equipment; the outer valve body is detachably connected with the inner valve body, a third exhaust port communicated with the second exhaust port is formed in the outer valve body, and the first exhaust port, the second exhaust port and the third exhaust port form an exhaust channel; the sealing piece is arranged between the inner valve body and the outer valve body, the exhaust valve has a first sealing state and a second exhaust state, and in the first state, one end of the sealing piece is matched with the outer valve body in an abutting mode, and the other end of the sealing piece is compressed, deformed and matched with the inner valve body in a sealing mode; in the second state, one end of the sealing piece is in abutting fit with the outer valve body, and the other end of the sealing piece is in clearance fit with the inner valve body. The exhaust valve can realize automatic exhaust of gas, and ensures that liquid is not discharged during exhaust.

Description

Technical Field

[0001] This utility model belongs to the field of secondary battery safety technology, specifically relating to an exhaust valve and battery cover assembly. Background Technology

[0002] The demand and capacity of rechargeable batteries are increasing daily, leading to a growing problem of gas generation within them. As the amount of gas generated inside rechargeable batteries increases, if it cannot be released in time, it will gradually cause the batteries to swell and deform, and in severe cases, excessive internal pressure may lead to an explosion.

[0003] To address the issue of internal gas generation in secondary batteries, an explosion-proof valve is typically installed on the battery cover assembly. When the internal thermal runaway gas pressure reaches a certain threshold, the explosion-proof valve ruptures, creating a vent on the top cover to release pressure and prevent an explosion due to excessive internal pressure. However, the explosion-proof valve primarily functions when there is a large amount of gas generated inside the secondary battery. It cannot solve problems such as bulging, deformation, and increased pressure caused by slow or small amounts of gas generation. Furthermore, the explosion-proof valve is a disposable component; its activation can damage the battery structure. Therefore, its limitations are significant, and it still affects the safety of the secondary battery. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide an exhaust valve, a battery cover assembly, a battery, and an electrical device.

[0005] A first aspect of this utility model provides an exhaust valve, comprising:

[0006] The inner valve body has a first exhaust port and a second exhaust port at both ends along the axial direction, and the first exhaust port is used to communicate with the exhaust port of the gas generating equipment.

[0007] An outer valve body is detachably connected to the inner valve body. The outer valve body is provided with a third exhaust port that communicates with the second exhaust port. The first exhaust port, the second exhaust port, and the third exhaust port form an exhaust channel.

[0008] A sealing element is disposed between the inner valve body and the outer valve body. The exhaust valve has a first sealed state and a second exhaust state. In the first state, one end of the sealing element is in a stop-fitting engagement with the outer valve body, and the other end of the sealing element is compressed and deformed to seal against the inner valve body, so that the second exhaust port is in a sealed state. In the second state, one end of the sealing element is in a stop-fitting engagement with the outer valve body, and the other end of the sealing element is in a clearance fit with the inner valve body, so that the second exhaust port and the third exhaust port are in a communicating state.

[0009] In addition, the exhaust valve of this utility model may also have the following additional technical features:

[0010] Preferably, the sealing element includes a circular top wall and a conical side wall, the circular top wall and the conical side wall forming a frustum-shaped structure, the circular top wall being in a stop fit with the outer valve body, and the conical side wall being in a sealing fit or clearance fit with the inner valve body.

[0011] Preferably, the end of the conical sidewall away from the circular top wall has a circular opening, and the projection of the second exhaust port along the axial direction of the inner valve body is located inside the circular opening;

[0012] The circular top wall and the third exhaust port are offset from or partially overlap each other along an axial direction perpendicular to the inner valve body.

[0013] Preferably, there are multiple second exhaust ports, and the multiple second exhaust ports are distributed in a first annular array on the inner valve body, wherein the outer diameter of the first annular array is smaller than the diameter of the circular port;

[0014] Alternatively, the second exhaust port may be a first annular hole, the outer diameter of which is smaller than the diameter of the circular opening.

[0015] Preferably, there are multiple third exhaust ports, and the multiple third exhaust ports are distributed in a second annular array on the outer valve body, wherein the outer diameter of the second annular array is larger than the diameter of the circular top wall;

[0016] Alternatively, the third exhaust port may be a second annular hole, the outer diameter of which is larger than the diameter of the circular top wall.

[0017] Preferably, the exhaust valve further includes a movable component, which is movably disposed within the inner valve body along the axial direction of the inner valve body;

[0018] In the first state, one end of the movable part is sealed to the exhaust hole at the first exhaust port, and the other end of the movable part passes through the inner valve body and extends out of the inner valve body;

[0019] In the second state, one end of the movable member is in clearance fit with the exhaust hole at the first exhaust port, and the other end of the movable member passes through the inner valve body and is in a stop fit with the seal.

[0020] Preferably, the movable component includes a rod and an arc-shaped boss. The rod is slidably disposed on the inner valve body along the axial direction of the inner valve body, and the arc-shaped boss is in a sealing fit or clearance fit with the exhaust hole.

[0021] Preferably, the portion of the rod body located within the inner valve body is fitted with an elastic element. In the first state, the elastic force of the elastic element causes the arc-shaped boss to seal against the exhaust port. In the second state, the elastic element compresses and deforms, causing the arc-shaped boss to have a clearance fit with the exhaust port.

[0022] Preferably, a welded part is provided on the outer side wall of the inner valve body near the first exhaust port.

[0023] Preferably, the inner valve body is provided with an external thread, and the outer valve body is provided with an internal thread, and the inner valve body and the outer valve body are detachably connected through the internal thread and the external thread.

[0024] A second aspect of this utility model provides a battery cover assembly, including a cover body, wherein the cover body is provided with the vent hole, and the vent hole is provided with the vent valve described in any embodiment of this application.

[0025] A third aspect of this utility model provides a battery, the battery including the exhaust valve described in any embodiment of this application, or including the battery cover assembly described in any embodiment of this application.

[0026] A fourth aspect of this utility model provides an electrical device, the electrical device including the battery described in any embodiment of this application.

[0027] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0028] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0029] Figure 1 A perspective view of the exhaust valve provided in the embodiments of this application;

[0030] Figure 2 An exploded view of the exhaust valve provided in an embodiment of this application;

[0031] Figure 3 A cross-sectional view of the exhaust valve provided in an embodiment of this application;

[0032] Figure 4 A perspective view of the sealing element provided in the embodiments of this application;

[0033] Figure 5 for Figure 4 Side view of the provided seal;

[0034] Figure 6This is a perspective structural diagram of the inner valve body provided in an embodiment of this application;

[0035] Figure 7 for Figure 6 A side view of the inner valve body is provided.

[0036] Figure 8 This is a perspective view of the external valve body provided in an embodiment of this application;

[0037] Figure 9 for Figure 8 A side view of the outer valve body is provided;

[0038] Figure 10 A perspective structural diagram of the movable component provided in the embodiments of this application;

[0039] Figure 11 for Figure 10 Side view of the provided active component;

[0040] Figure 12 A top view of the battery cover assembly provided in an embodiment of this application;

[0041] Figure 13 A side view of the battery cover assembly provided in an embodiment of this application;

[0042] Figure 14 for Figure 13 Enlarged view of a portion of point A (the exhaust valve is in a sealed state);

[0043] Figure 15 This is a structural diagram showing the exhaust valve in the exhaust state.

[0044] In the above image:

[0045] 100 Exhaust valve;

[0046] 110 Inner valve body; 111 First exhaust port; 112 Second exhaust port; 113 Mounting hole; 114 Welded part; 115 External thread;

[0047] 120 Outer valve body; 121 Third exhaust port; 122 Internal thread;

[0048] 130 Seal; 131 Circular top wall; 132 Conical side wall; 1321 Circular opening;

[0049] 140 Moving part; 141 Rod body; 142 Arc-shaped boss;

[0050] 150 elastic element;

[0051] 200 Battery cover assembly; 210 Cover body; 211 Vent hole; 212 Positive terminal; 213 Negative terminal. Detailed Implementation

[0052] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0053] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0054] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” as used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0055] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is interpreted as open and encompassing, that is, "including, but not limited to".

[0056] In the description of this specification, the terms "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples.

[0057] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0058] To solve the above technical problems, such as Figures 1 to 15 As shown, in a first aspect, this utility model provides an exhaust valve 100, comprising: an inner valve body 110, wherein a first exhaust port 111 and a second exhaust port 112 are respectively provided at both ends of the inner valve body 110 along the axial direction, and the first exhaust port 111 is configured to communicate with the exhaust port 211 of a gas generating device.

[0059] An outer valve body 120 is detachably connected to an inner valve body 110. The outer valve body 120 is provided with a third exhaust port 121 that communicates with the second exhaust port 112. The first exhaust port 111, the second exhaust port 112, and the third exhaust port 121 form an exhaust channel.

[0060] A sealing element 130 is disposed between the inner valve body 110 and the outer valve body 120. The exhaust valve 100 has a first sealed state and a second exhaust state. In the first state, one end of the sealing element 130 is in a stop-fitting engagement with the outer valve body 120, and the other end of the sealing element 130 is compressed and deformed to seal against the inner valve body 110, so that the second exhaust port 112 is in a sealed state. In the second state, one end of the sealing element 130 is in a stop-fitting engagement with the outer valve body 120, and the other end of the sealing element 130 is in a clearance fit with the inner valve body 110, so that the second exhaust port 112 is in a communicating state with the third exhaust port 121.

[0061] Specifically, the inner valve body 110 is a hollow cavity structure with two through-holes. Its two axial ends have a first exhaust port 111 and a second exhaust port 112, respectively. The first exhaust port 111 is located at the lower end of the inner valve body 110 and communicates with the exhaust port 211 of the gas generating device. The diameter of the first exhaust port 111 is larger than the diameter of the exhaust port 211. The upper end of the inner valve body 110 has a frustum structure, and the second exhaust port 112 is located on the frustum structure. The second exhaust port 112 communicates with the first exhaust port 111 through the hollow cavity of the inner valve body 110. The exhaust port 211 of the gas generating device can be a battery injection port, such as the injection port of a lithium-ion battery. This injection port allows for both battery venting and electrolyte injection.

[0062] The outer valve body 120 is a hollow cavity structure with two through-holes. The lower end of the outer valve body 120 has an opening, which allows the outer valve body 120 to slide into the outside of the inner valve body 110. The outer valve body 120 and the inner valve body 110 are fixedly connected. The upper end of the outer valve body 120 has a frustum structure. The top wall of the frustum structure is opposite to the second exhaust port 112, and at least one third exhaust port 121 communicating with the outside is provided on the top wall. The third exhaust port 121, the second exhaust port 112 and the first exhaust port 111 are connected to form an exhaust channel.

[0063] An installation gap is reserved between the inner valve body 110 and the outer valve body 120. The sealing element 130 is set in the installation gap. While the inner valve body 110 and the outer valve body 120 are fixedly connected, the upper end of the sealing element 130 is engaged with the lower surface of the top wall of the outer valve body 120, and the lower end of the sealing element 130 is engaged with the upper surface of the top wall of the inner valve body 110. That is, when the sealing element 130 is subjected to the pressure of the inner valve body 110 and the outer valve body 120 being tightened, the lower end of the sealing element 130 will undergo a certain degree of outward deformation, so that the sealing element 130 is tightly fitted with the inner valve body 110, thereby sealing the second exhaust port 112 through the sealing element 130, so that the exhaust valve 100 is in a sealed state, and the gas discharged by the gas generating equipment through the exhaust hole 211 cannot be discharged outward through the second exhaust port 112. When the exhaust valve 100 is in the exhaust state, the gas generated by the gas generating device can be discharged upward through the exhaust port 211, pushing the seal 130 so that the upper end of the seal 130 is in a stop-fitting position with the inner valve body 110, and the lower end of the seal 130 deforms and is in a clearance fit with the inner valve body 110. This allows the second exhaust port 112 and the third exhaust port 121 to be in a connected state. The gas generated by the gas generating device can flow sequentially through the exhaust port 211, the second exhaust port 112, and then be discharged to the outside through the third exhaust port 121. The seal 130 can be a rubber seal 130, which has the ability to deform under pressure.

[0064] Understandably, during the exhaust process, the seal 130 prevents gas from passing through the gap between the seal 130 and the inner valve body 110, while the liquid is confined within the hollow cavity of the inner valve body 110. This prevents the liquid from causing severe corrosion to the surrounding environment and equipment, thus improving the safety of the gas generating equipment. The liquid discharged from the gas generating equipment can be electrolyte, etc.

[0065] The exhaust valve 100 provided in this application embodiment has a simple structure. It can ensure that the internal pressure of the gas generating equipment does not rise excessively when the gas generating equipment is slowly producing gas, thus avoiding bulging and deformation caused by a small amount of gas production. The exhaust method is gentle and will not damage the structure of the gas generating equipment. It can also ensure that liquid is not discharged during exhaust, thus avoiding serious corrosion to the surrounding environment and equipment, improving the safety of the gas generating equipment, and ensuring the performance of the gas generating equipment.

[0066] In some implementations, such as Figure 4 and Figure 5 As shown, the sealing element 130 includes a circular top wall 131 and a conical side wall 132. The circular top wall 131 and the conical side wall 132 form a frustum-shaped structure. The circular top wall 131 is in a top-stop fit with the outer valve body 120, and the conical side wall 132 is in a sealing fit or clearance fit with the inner valve body 110.

[0067] Specifically, the circular top wall 131 and the conical side wall 132 constitute a frustum-shaped sealing element 130. The circular top wall 131 and the conical side wall 132 can be integrally formed or separately. Both the circular top wall 131 and the conical side wall 132 are made of rubber. The conical side wall 132 has the ability to deform under pressure. While the inner valve body 110 and the outer valve body 120 are fastened, the lower end of the conical side wall 132 can deform under pressure to form a certain degree of outward flange. This outward flange can interact with the inner valve body 110. The valve body 110 fits tightly. In the first state, the circular top wall 131 is in a stop-fitting position with the outer valve body 120, and the lower end of the conical side wall 132 is pressed and sealed with the inner valve body 110. In the second state, the circular top wall 131 is in a stop-fitting position with the outer valve body 120, and the lower end of the conical side wall 132 is deformed by the pressure of the gas discharged from the exhaust hole 211, and the lower end of the conical side wall 132 is in a clearance fit with the inner valve body 110, so that the exhaust valve 100 is in the exhaust state.

[0068] In this example, the sealing fit between the seal 130 and the inner valve body 110 keeps the second exhaust port 112 and the third exhaust port 121 in a disconnected state, thereby forming a first sealing channel at the second exhaust port 112, keeping the exhaust valve 100 in a sealed state and ensuring the sealing performance of the gas generating equipment; and the clearance fit between the seal 130 and the inner valve body 110 keeps the second exhaust port 112 and the third exhaust port 121 in a connected state, thereby keeping the exhaust valve 100 in an exhaust state to discharge the gas generated by the gas generating equipment.

[0069] In some implementations, such as Figures 1 to 5 As shown, the tapered sidewall 132 has a circular opening 1321 at one end away from the circular top wall 131, and the projection of the second exhaust port 112 along the axial direction of the inner valve body 110 is located inside the circular opening 1321.

[0070] The circular top wall 131 and the third exhaust port 121 are offset from or partially overlap each other along an axial direction perpendicular to the inner valve body 110.

[0071] Specifically, the projection of the second exhaust port 112 along the axial direction of the inner valve body 110 is located inside the circular port 1321. That is, along the axial direction of the inner valve body 110, the projected area of ​​the second exhaust port 112 is smaller than the projected area of ​​the circular port 1321. This allows the sealing element 130 to effectively seal the second exhaust port 112 in the first state and to effectively block the liquid discharged from the product equipment in the second state, ensuring that the liquid is not discharged during exhaust and improving the safety of the gas generating equipment.

[0072] Along the axial direction perpendicular to the inner valve body 110, the circular top wall 131 and the third exhaust port 121 are staggered or partially overlapped, and the circular top wall 131 does not completely cover the third exhaust port 121, so that during the process of the circular top wall 131 and the outer valve body 120 being engaged, the third exhaust port 121 and the hollow cavity of the outer valve body 120 are always in communication.

[0073] In some implementations, such as Figure 3 and Figure 6 As shown, there are multiple second exhaust ports 112, and the multiple second exhaust ports 112 are distributed in a first annular array on the inner valve body 110. The outer diameter of the first annular array is smaller than the diameter of the circular port 1321.

[0074] Alternatively, the second exhaust port 112 may be a first annular hole, the outer diameter of which is smaller than the diameter of the circular port 1321.

[0075] Specifically, the inner valve body 110 has multiple second exhaust ports 112, which are evenly distributed in a first annular array on the inner valve body 110 to facilitate the uniform airflow discharge of gas from the battery. For example, the number of second exhaust ports 112 may be 2, 3, or 4. The outer diameter of the first annular array refers to the diameter of the circumcircle of the multiple second exhaust ports 112, and the shape of the second exhaust ports 112 can be circular, square, triangular, etc. Alternatively, the inner valve body 110 may have a first annular hole, such as a circular annular hole.

[0076] The outer diameter of the first annular array is smaller than the diameter of the circular opening 1321, or the outer diameter of the first annular hole is smaller than the diameter of the circular opening 1321, so that the seal 130 can effectively seal the second exhaust port 112 in the first state and effectively block the liquid discharged from the product equipment in the second state, ensuring that the liquid is not discharged during exhaust and improving the safety of the gas generating equipment.

[0077] It is understandable that the diameter of the circular opening 1321 is smaller than the outer diameter of the inner valve body 110 and smaller than the inner diameter of the outer valve body 120, so that the seal 130 is located in the cavity formed by the inner valve body 110 and the outer valve body 120.

[0078] In some implementations, such as Figure 8 and Figure 9 As shown, there are multiple third exhaust ports 121, and the multiple third exhaust ports 121 are distributed in a second annular array on the outer valve body 120. The outer diameter of the second annular array is larger than the diameter of the circular top wall 131.

[0079] Alternatively, the third exhaust port 121 may be a second annular hole, the outer diameter of which is larger than the diameter of the circular top wall 131.

[0080] Specifically, the outer valve body 120 has multiple third exhaust ports 121, which are connected to the outside. These third exhaust ports 121 are evenly distributed in a second annular array on the outer valve body 120 to facilitate the uniform airflow control of the gas inside the battery. For example, the number of third exhaust ports 121 may be 2, 3, or 4. The outer diameter of the second annular array refers to the diameter of the circumcircle of the multiple third exhaust ports 121. The shape of the third exhaust ports 121 can be circular, square, triangular, etc. Alternatively, the outer valve body 120 may have a second annular hole, such as a circular annular hole.

[0081] The outer diameter of the second annular array is larger than the diameter of the circular top wall 131, or the outer diameter of the second annular hole is larger than the diameter of the circular top wall 131, so that the circular top wall 131 does not completely cover the third exhaust port 121. During the exhaust or sealing process of the exhaust valve 100, the third exhaust port 121 and the hollow cavity of the outer valve body 120 are always in communication.

[0082] In some implementations, such as Figures 1 to 3 As shown, the exhaust valve 100 also includes a movable member 140, which is movably disposed within the inner valve body 110 along the axial direction of the inner valve body 110.

[0083] In the first state, one end of the movable member 140 is sealed to the exhaust hole 211 at the first exhaust port 111, and the other end of the movable member 140 passes through the inner valve body 110 and extends out of the inner valve body 110.

[0084] In the second state, one end of the movable member 140 is in clearance fit with the exhaust hole 211 at the first exhaust port 111, and the other end of the movable member 140 passes through the inner valve body 110 and is in a stop fit with the sealing member 130.

[0085] Specifically, the movable component 140 penetrates the top wall of the inner valve body 110 and is movably mounted on the inner valve body 110. That is, the top wall of the inner valve body 110 has a mounting hole 113 opposite to the exhaust port 211. The movable component 140 is mounted at the mounting hole 113 and can move up and down along the axial direction of the inner valve body 110. In the first state, the upper end of the movable component 140 passes through the mounting hole 113 and extends out of the inner valve body 110, while the lower end of the movable component 140 is sealed to the exhaust port 211, forming a second sealing channel at the second exhaust port 112 of the exhaust valve 100. The second sealing channel cooperates with the first sealing channel, providing double protection and ensuring the sealing performance of the exhaust valve 100. In the second state, the upper end of the movable part 140 passes through the mounting hole 113 and extends out of the inner valve body 110, and the upper end of the movable part 140 is in a stop-fitting relationship with the inner valve body 110. The lower end of the movable part 140 forms a gap with the exhaust hole 211 so that the exhaust hole 211 is connected to the hollow cavity inside the inner valve body 110. The exhaust valve 100 is in the exhaust state, so that the gas generated by the gas generating equipment is discharged to the outside through the exhaust valve 100.

[0086] In some implementations, such as Figure 10 and Figure 11 As shown, the movable component 140 includes a rod 141 and an arc-shaped boss 142. The rod 141 is slidably disposed on the inner valve body 110 along the axial direction of the inner valve body 110. The arc-shaped boss 142 is in a sealing fit or clearance fit with the exhaust hole 211.

[0087] Specifically, the rod 141 and the arc-shaped boss 142 constitute a T-shaped movable part 140. The rod 141 is axially movable on the inner valve body 110 through the mounting hole 113, and the rod 141 is fixedly connected to the arc-shaped boss 142. If it is integrally formed, the arc-shaped boss 142 can be a hemispherical boss. The arc-shaped boss 142 is composed of an arc-shaped surface and a plane. The plane is fixedly connected to the rod 141, and the arc-shaped surface is set towards the exhaust hole 211. The arc width of the arc-shaped boss 142 is greater than the diameter of the exhaust hole 211. In the first state, the arc surface of the arc-shaped boss 142 is sealed with the exhaust hole 211 so that the exhaust valve 100 forms a second sealing channel at the first exhaust port 111. In the second state, the rod 141 and the arc-shaped boss 142 move upward as a whole under the pressure of the gas discharged from the exhaust hole 211, and a gap is formed between the arc-shaped boss 142 and the exhaust hole 211, so that the exhaust hole 211 is connected to the hollow cavity inside the inner valve body 110, thereby putting the exhaust valve 100 in the exhaust state.

[0088] In some implementations, such as Figures 1 to 3As shown, the portion of the rod 141 located inside the inner valve body 110 is fitted with an elastic element 150. In the first state, the elastic force of the elastic element 150 causes the arc-shaped boss 142 to seal with the exhaust hole 211. In the second state, the elastic element 150 is compressed and deformed, causing the arc-shaped boss 142 to have a clearance fit with the exhaust hole 211.

[0089] Specifically, an elastic element 150 is sleeved on the rod 141 located inside the inner valve body 110. The elastic element 150 can be a spring. The upper end of the elastic element 150 abuts against the top wall of the inner valve body 110, and the other end of the elastic element 150 abuts against the arc-shaped boss 142. In the first sealed state of the exhaust valve 100, the elastic force of the elastic element 150 seals the arc-shaped boss 142 and the exhaust hole 211. In the second exhaust state of the exhaust valve 100, the elastic element 150 is in a compressed state. After the exhaust valve 100 completes exhaust and the internal pressure of the gas generating equipment returns to normal, the elastic element 150 provides a restoring force to the rod 141 and the arc-shaped boss 142, causing the movable part 140 to move downward as a whole, and sealing the arc-shaped boss 142 with the exhaust hole 211, thus enabling the exhaust valve 100 to be reused and improving its utilization rate.

[0090] In some implementations, such as Figure 6 and Figure 7 As shown, a welded part 114 is provided on the outer side wall of the inner valve body 110 near the first exhaust port 111.

[0091] Specifically, the inner valve body 110 is connected to the gas generating equipment by welding and sealing through the welding part 114, so that the exhaust valve 100 can be stably fixed on the gas generating equipment.

[0092] In some implementations, such as Figures 6 to 9 As shown, the inner valve body 110 is provided with an external thread 115, and the outer valve body 120 is provided with an internal thread 122. The inner valve body 110 and the outer valve body 120 are detachably connected through the internal thread 122 and the external thread 115.

[0093] Specifically, the inner valve body 110 and the outer valve body 120 are fixed by matching external threads 115 and internal threads 122. The number of turns of the threads increases the deformation of the sealing element 130, thereby making the sealing element 130 seal with the inner valve body 110, so that the exhaust valve 100 is in a sealed state, which can meet the needs of gas generating equipment with different production pressures. Different production pressures refer to the different gas pressures generated by the gas generating equipment.

[0094] It should be noted that active venting of the gas generating equipment can be achieved by adjusting the matching external threads 115 and internal threads 122 of the inner valve body 110 and the outer valve body 120. For example, an exhaust pipe can be connected to the outside of the outer valve body 120. Adjusting the number of rotations of the threads of the inner valve body 110 and the outer valve body 120 can reduce the deformation of the seal 130. The external negative pressure and internal positive pressure of the exhaust valve 100 can create a gap between the seal 300 and the second exhaust port 112 of the inner valve body 120. At the same time, a gap can be created between the moving part 140 and the exhaust hole 211. That is, both the first exhaust channel and the second exhaust channel are open, so that the gas generating equipment can be actively vented according to actual needs.

[0095] The inner valve body 110 includes a first sidewall, a first top wall fixedly disposed at the upper end of the first sidewall, a first exhaust port 111 at the lower end of the first sidewall, and a second exhaust port 112 opened on the first top wall. The first sidewall can be a circular sidewall or a square sidewall, etc., and the corresponding first top wall is a circular top wall 131 or a square top wall. The first sidewall and the first top wall can also be other shapes, and this application embodiment does not make any special limitation.

[0096] The outer valve body 120 includes a second sidewall, a second top wall fixedly disposed at the upper end of the second sidewall, and an opening at the lower end of the second sidewall, allowing the second sidewall to be fitted onto the first sidewall and screwed together. A third exhaust port 121 communicating with the outside is provided on the first sidewall. The second sidewall can be a circular sidewall or a square sidewall, etc., and the corresponding second top wall can be a circular top wall 131 or a square top wall. The second sidewall and the second top wall can also be other shapes, and this embodiment does not impose any particular limitation. The first sidewall and the second sidewall have the same shape, and the first top wall and the second top wall have the same shape.

[0097] The second aspect of this utility model is as follows: Figures 12 to 15 As shown, a battery cover assembly 200 is provided, including a cover body 210, on which the vent hole 211 is provided, and the vent hole 211 is provided with the vent valve 100 as described in any embodiment of this application.

[0098] Specifically, the battery cover body 210 is provided with a vent hole 211, which can serve as a battery electrolyte injection hole. This vent hole 211 allows for both venting and electrolyte injection. A vent valve 100, as described in any embodiment of this application, protrudes and is sealed at the vent hole 211. The inner valve body 110 of the vent valve 100 is welded and fixed to the cover body 210 via a welding part 114. This ensures timely venting when the gas-generating equipment, such as a secondary battery, slowly generates gas, maintaining a constant internal pressure within a certain range. It also prevents the explosion-proof valve from failing to burst due to excessive gas release, thus improving the safety of the secondary battery. Furthermore, during venting, liquid is not discharged, avoiding severe corrosion to the surrounding environment and equipment, improving the safety of the gas-generating equipment, and ensuring its performance.

[0099] It should be noted that the specific technical features and technical effects of the battery cover assembly 200 provided in this application embodiment are the same as those of the exhaust valve 100, and will not be repeated in this application embodiment.

[0100] It is understandable that, such as Figure 12 and Figure 13 As shown, the cover plate body 210 is also equipped with conventional components such as positive terminal 212, negative terminal 213, and explosion-proof valve.

[0101] A third aspect of this utility model provides a battery, which includes the exhaust valve 100 described in any embodiment of this application, or the battery cover assembly 200 described in any embodiment of this application.

[0102] Specifically, the exhaust valve 100 can promptly discharge the gas generated by the electrolyte reaction inside the battery cell, stabilizing the internal gas pressure of the battery cell. The specific technical features and effects of the battery are consistent with those of the exhaust valve 100, and will not be repeated in the embodiments of this application. The battery can be a lithium-ion battery, etc.

[0103] A fourth aspect of this utility model provides an electrical device, the electrical device including the battery described in any embodiment of this application.

[0104] Specifically, the technical features and effects of the electrical equipment are consistent with those of the exhaust valve 100, and will not be repeated in the embodiments of this application.

[0105] It should be noted that electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This utility model embodiment does not impose any special limitations on the above-mentioned electrical equipment.

[0106] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An exhaust valve (100), characterized in that, include: The inner valve body (110) has a first exhaust port (111) and a second exhaust port (112) respectively at both ends along the axial direction. The first exhaust port (111) is used to communicate with the exhaust port (211) of the gas generating equipment. An outer valve body (120) is detachably connected to an inner valve body (110). The outer valve body (120) is provided with a third exhaust port (121) that communicates with the second exhaust port (112). The first exhaust port (111), the second exhaust port (112), and the third exhaust port (121) form an exhaust channel. A sealing element (130) is disposed between the inner valve body (110) and the outer valve body (120). The exhaust valve (100) has a first sealed state and a second exhaust state. In the first state, one end of the sealing element (130) is in a stop-fitting relationship with the outer valve body (120), and the other end of the sealing element (130) is compressed and deformed and in a sealing fit with the inner valve body (110), so that the second exhaust port (112) is in a sealed state. In the second state, one end of the sealing element (130) is in a stop-fitting relationship with the outer valve body (120), and the other end of the sealing element (130) is in a clearance fit with the inner valve body (110), so that the second exhaust port (112) and the third exhaust port (121) are in a communicating state.

2. The exhaust valve (100) according to claim 1, characterized in that, The sealing element (130) includes a circular top wall (131) and a conical side wall (132), the circular top wall (131) and the conical side wall (132) forming a frustum structure, the circular top wall (131) being in a stop fit with the outer valve body (120), and the conical side wall (132) being in a sealing fit or clearance fit with the inner valve body (110).

3. The exhaust valve (100) according to claim 2, characterized in that, The tapered sidewall (132) has a circular opening (1321) at one end away from the circular top wall (131), and the projection of the second exhaust port (112) along the axial direction of the inner valve body (110) is located inside the circular opening (1321); The circular top wall (131) and the third exhaust port (121) are offset or partially overlapped along an axial direction perpendicular to the inner valve body (110).

4. The exhaust valve (100) according to claim 3, characterized in that, There are multiple second exhaust ports (112), and the multiple second exhaust ports (112) are distributed in a first annular array on the inner valve body (110). The outer diameter of the first annular array is smaller than the diameter of the circular port (1321). Alternatively, the second exhaust port (112) may be a first annular hole, the outer diameter of which is smaller than the diameter of the circular opening (1321).

5. The exhaust valve (100) according to claim 3, characterized in that, There are multiple third exhaust ports (121), and the multiple third exhaust ports (121) are distributed in a second annular array on the outer valve body (120). The outer diameter of the second annular array is larger than the diameter of the circular top wall (131). Alternatively, the third exhaust port (121) may be a second annular hole, the outer diameter of which is larger than the diameter of the circular top wall (131).

6. The exhaust valve (100) according to any one of claims 1-5, characterized in that, The exhaust valve (100) also includes a movable part (140), which is movably disposed within the inner valve body (110) along the axial direction of the inner valve body (110); In the first state, one end of the movable part (140) is sealed to the exhaust hole (211) at the first exhaust port (111), and the other end of the movable part (140) passes through the inner valve body (110) and extends out of the inner valve body (110); In the second state, one end of the movable member (140) is in clearance fit with the exhaust hole (211) at the first exhaust port (111), and the other end of the movable member (140) passes through the inner valve body (110) and is in a stop fit with the seal (130).

7. The exhaust valve (100) according to claim 6, characterized in that, The movable part (140) includes a rod (141) and an arc-shaped boss (142). The rod (141) is slidably disposed on the inner valve body (110) along the axial direction of the inner valve body (110). The arc-shaped boss (142) is sealed or clearance-fitted with the exhaust hole (211).

8. The exhaust valve (100) according to claim 7, characterized in that, The portion of the rod (141) located inside the inner valve body (110) is fitted with an elastic element (150). In the first state, the elastic force of the elastic element (150) causes the arc-shaped boss (142) to seal with the exhaust hole (211). In the second state, the elastic element (150) is compressed and deformed, causing the arc-shaped boss (142) to have a clearance fit with the exhaust hole (211).

9. The exhaust valve (100) according to claim 1, characterized in that, The inner valve body (110) is provided with an external thread (115), and the outer valve body (120) is provided with an internal thread (122). The inner valve body (110) and the outer valve body (120) are detachably connected by the internal thread (122) and the external thread (115).

10. A battery cover assembly (200), characterized in that, It includes a cover plate body (210), on which the exhaust hole (211) is provided, and an exhaust valve (100) according to any one of claims 1-9 is provided at the exhaust hole (211).

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